<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>一列布局</title>
    <style type="text/css">
        body{ margin:0; padding:0; font-size:30px}
        div{ text-align:center; font-weight:bold}
        .main,.footer{ width:960px;margin:0 auto;}
        .head{ width:100%; height:100px; background:#ccc}
        .main{ height:600px; background:#FCC}
        .footer{ height:50px; background:#9CF}
    </style>
</head>

<body>
<div class="head">head</div>
<div class="main">main</div>
<div class="footer">footer</div>
</body>
</html>